Einstein Telescope R&D

ET-R&D项目旨在为爱因斯坦望远镜的技术设计做准备的基本研发任务，爱因斯坦望远镜是第三代地下引力波探测器。虽然基本设计主要依赖于先进探测器的良好开发和测试技术，但仍有几个方面需要长时间的研发。我们建议通过5个工作组(WG)在这个ET-R&D项目中针对这些最重要的主题。WG1将探索天体物理源模型和GR本身如何能够用ET进行测试，以及从数据中可以提取多少关于宇宙动力学的信息。WG2将收集各种候选地点的长期地震数据，并开发测量地震运动的方法，这些方法直接与测试质量运动耦合，目标是开发减法技术。WG3将研究低温光学的特性，这些特性对于降低探测器的热噪声和提供良好的低频性能至关重要。WG4将研究三种不同ET探测器数据中各种干涉仪自由度和噪声相关性的控制。WG5将重点放在整体项目管理上。

The ET-R&D project is aimed at essential R&D tasks in preparation for a technical design of the Einstein Telescope, a 3rd generation, underground gravitational wave detector. While the basic design mostly relies on techniques well developed and tested for the advanced detectors, several aspects still require R&D with long lead times. We propose to target the most important of these topics in this ET-R&D project via 5 working groups (WGs).WG1 will explore how well astrophysical source models and GR itself can be tested with ET, and how much information on the dynamics of the universe can be extracted from the data. WG2 will collect long term seismic data for various candidate sites and develop methods for measuring the seismic motion which directly couples to the test mass motion, with the goal of developing subtraction techniques. WG3 will investigate properties of cryogenic optics essential for lowering detector thermal noise and providing good low frequency performance. The control of various interferometer degrees of freedom and noise correlations in the data of the three different ET detectors will be studied in WG4. WG5 will focus on overall project management.